Nobody told me to have at least a small multiplier of magicka as advantage if you want to cast any kind of spells.
I'm regretting that at the moment, I'm wanting to enchant my armor but even my custom soul-trap spell gets absorped.
Also you have to have resist paralysis, so many vampires, nightblades, spiders, liches and scorpions all paralyzing me for something like 10 minutes each time.
Don't punch with rings on, they will break.
Don't steal anything, except at night where you can loot the entire store with you wagon and then sell all the goods back to the owner the next day.
Guild Advancement is based soley on skills, don't bother choosing a quest you've done before.
Some of the dungeons are suprisingly exciting with underwater grottos, levers activating portcullises, levers activating elevators, rotating walls, and rotating platforms. But you soon realise most are randomly generated labyrinthine nightmares.
You can customise the controls for proper WADS firstperson with mouse-look, you just have to have a button to toggle between looking and attacking.
To climb you have to be absolutely face-on to the wall your climbing.
All the loot is levelled, so rob those shops at night when Daedric is available.
Also, make sure you use cheats, I found the game much too hard without them (use dungeon navigation cheats as well).